New Course Launches Blank Screen

avanderzwaag Community Member, Lectora® Accessibility Group (LAUG) Member, eLearning Brothers® Partner Posts: 2 ☆ Roadie ☆
My colleagues and I are having a repeated issue of a new course, when attempting to preview in ReviewLink, launches a blank screen. Using 19.0.4 of Lectora.

We have refreshed the page, cleared our cache, re-uploaded, tried in a different web browser. Nothing has worked.

Has anyone else had this issue? Fixes?